CVE-2025-67488: b3log siyuan Path Traversal

Vulnerability summary

CVE-2025-67488 is a high (CVSS 8.8) Path Traversal vulnerability in b3log siyuan. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.7% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 09-12-2025
   PublishedVulnerability first disclosed.
2. 09-12-2025
   Last modifiedVulnerability information updated.

Description

SiYuan is self-hosted, open source personal knowledge management software. Versions 0.0.0-20251202123337-6ef83b42c7ce and below contain function importZipMd which is vulnerable to ZipSlips, allowing an authenticated user to overwrite files on the system. An authenticated user with access to the import functionality in notes is able to overwrite any file on the system, and can escalate to full code execution under some circumstances. A fix is planned for version 3.5.0.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.